Juha Laiho wrote:
Bruce wrote:
I have an installation where Tomcat stops every couple hours.
* Tomcat 6.0.18
* Windows XP pro - 2.3GHz, 2G memory
* The application is in a .war file.
* This app reads and writes to a MySQL database on the same machine.
What happens is that the application will run for about 3 hours or
so. Suddenly, it stops responding.
A thread dump of the hung Tomcat might well bring more light to the
situation. To me at least this sounds like a thread starvation issue
(for some reason, the request processing threads are not recycled to
serve future requests). The thread dump might well bring insight as to
what the reason might be.
One reason for the starvation might be some deadlock situation across
separate threads accessing the database.
Other things to check are the memory and CPU usage of the hung Tomcat
process - they might also provide some more clues.
While it was down I checked both mysqld-nt and tomcat6 processes and
they are both running (11,076k & 92,996k respectively). Both have
priorities set to normal.
I will do a re-install of Tomcat before I get involved with a thread
dump. My reason is that the other sites do not have a problem and this
problem may be a simple case of corrupted files.
Bruce
